C1jm12345a 16806..16818
نویسندگان
چکیده
The paper reviews recent progress on chiral nanocrystal assemblies with induced optical chirality and related circular dichroism. Many natural molecules and biomolecules are chiral and exhibit remarkably strong optical chirality (circular dichroism) due to their amazingly uniform atomic composition in a large ensemble. It is challenging to realize artificial nanoscale systems with optical chirality since the atomic structure of artificial nanostructures may not be always controlled or even known. Nevertheless, the artificial optical chirality has been accomplished and it is the main scope of this review. In particular, we discuss assemblies incorporating chiral molecules, metal nanocrystals, and semiconductor quantum dots. Plasmon-induced and plasmon-enhanced circular dichroism effects appear in nanoscale assemblies built with metal nanocrystals, while excitonic and surface-states related phenomena are observed in semiconductor quantum dots conjugated with chiral molecules.
منابع مشابه
Modeling Inoperability Propagation Using Bayesian Networks
The modeling of critical infrastructure interdependencies is a challenging task. This paper discusses several interdependency modeling requirements and proposes a Bayesian network approach for modeling interdependencies and inoperability propagation. The approach is applied to a case study involving the Japanese critical infrastructure sectors. Survey data published by the National Institute of...
متن کاملHigh Security with Low Latency in Legacy SCADA Systems
Message authentication with low latency is necessary to ensure secure operations in legacy industrial control networks such as those in the power grid. Previous authentication solutions that examine single messages incur noticeable latency. This paper describes Predictive YASIR, a bump-in-the-wire device that reduces the latency by considering broader patterns of messages. The device predicts t...
متن کاملProtecting the Food Supply Chain from Terrorist Attack
The food supply chain is a critical infrastructure that is an attractive target for terrorist attacks. Despite its importance, relatively little research has focused on improving the security of the food supply chain infrastructure. This is largely due to a lack of awareness on the part of food supply chain stakeholders and authorities about the threats. This paper describes a methodology for a...
متن کاملModeling Control System Failures and Attacks - The Waterloo Campaign to Oil Pipelines
This paper presents a model for expressing control system failures and attacks on control protocols that involve the exchange of messages. Control failures and attacks are modeled using the notion of an attacker who can block and/or fabricate messages. These two attack mechanisms can cover a variety of scenarios ranging from control failures in the Waterloo Campaign to cyber attacks on oil pipe...
متن کاملForeign Direct Investment in an Era of Increased Threats to Critical Infrastructures
The need to maintain national security while deriving the benefits of global economic liberalization presents a significant challenge for governments attempting to privatize critical infrastructure assets. In the post September 11, 2001 world, the notion that foreign direct investment positively contributes to an economy is being tempered by the realization that it can pose a threat to national...
متن کامل